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A Long Cycle‐Life High‐Voltage Spinel Lithium‐Ion Battery Electrode Achieved by Site‐Selective Doping
Author(s) -
Liang Gemeng,
Wu Zhibin,
Didier Christophe,
Zhang Wenchao,
Cuan Jing,
Li Baohua,
Ko KuanYu,
Hung PoYang,
Lu ChengZhang,
Chen Yuanzhen,
Leniec Grzegorz,
Kaczmarek Sławomir Maksymilian,
Johannessen Bernt,
Thomsen Lars,
Peterson Vanessa K.,
Pang Wei Kong,
Guo Zaiping
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202001454
Subject(s) - spinel , materials science , doping , electrode , battery (electricity) , cathode , electrochemistry , lithium (medication) , dissolution , ion , nanotechnology , chemical engineering , optoelectronics , chemistry , metallurgy , thermodynamics , medicine , power (physics) , physics , organic chemistry , endocrinology , engineering
Spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising cathode candidate for the next‐generation high energy‐density lithium‐ion batteries (LIBs). Unfortunately, the application of LNMO is hindered by its poor cycle stability. Now, site‐selectively doped LNMO electrode is prepared with exceptional durability. In this work, Mg is selectively doped onto both tetrahedral (8 a ) and octahedral (16 c ) sites in the Fd 3 ‾ m structure. This site‐selective doping not only suppresses unfavorable two‐phase reactions and stabilizes the LNMO structure against structural deformation, but also mitigates the dissolution of Mn during cycling. Mg‐doped LNMOs exhibit extraordinarily stable electrochemical performance in both half‐cells and prototype full‐batteries with novel TiNb 2 O 7 counter‐electrodes. This work pioneers an atomic‐doping engineering strategy for electrode materials that could be extended to other energy materials to create high‐performance devices.